Horizontal press roll assembly



July 30, 1940. E. E. BERRY HORIZONTAL PRESS ROLL ASSEMBLY Filed May 18, 1956 4 Sheets-Sheet l V-M 217142713 Za/JEfe /y July 30, 1940.

E. 5. BYERR'Y HORIZONTAL PRESS ROLL As'nmaLY Filed May 18, 1936 4 Sheets-Sheet 2 Ear! 21'. fierrly,

July 30, 1940. E. E. BERRY HORIZONTAL PRESS HULL ASSEMBLY Filed May 18, 1936 4 Sheets-Sheet 5 W 7 .105 21MB Mm MEI 7 U.q Earl ZZBer'ry.

July 30, 1940. E. E. BERRY HORIZONTAL PRESS ROLL. ASSEMBLY Filed May 18, 193sv 4 Sheets-Sheet 4 :2: l l k; his? mm & g 0% %N\ Q N\\\ MNN 0 mas July so, late noarzom'n. mass ROLL ASSEMBLY Earl E. Be y, Belolt, Wis, 588 8 to Beloit Iron Works, ,Beloit, Wis.,

consin a corporation of Wis- Application May 18, 1936, Serial No. 80,253

This invention relates to press roll assemblies for paper machines.

4 More specifically, this invention relates to press roll assemblies having the rolls therein mounted in horizontal relation whereby a single center roll performs the functions of two top press rolls in heretofore known assemblies.

Paper as it comes from the web forming part is wet and soggy and is passed through a press section of the machine for the extraction of large amounts of water therefrom by pressure and suction. The press roll sections one or more suction equipped with a top roll in vertical alignment above the suction or of a paper machine heretofore used contained or plain press rolls each plain press roll.

The present invention and provides for the and/or plain presses in horizontal invention section of According to this from the web forming machine is carried by a of the felt. The web then passes .nip between a center roll where additional web. The web next between a second suction or plain and the center roll for the removal of additional then passes through similar press and suction roll sections or directly between the second press roll and roll, it can fall out of opens downwardly.

Preferred structure for the horizontal press roll sections of this invention includes a pivotal mounting of the end rolls relative to the stabut rotatable center roll.

Mechanism is provided for carefully adjusting the pressure between the end rolls and the center roll and for tilting the end rolls away from the roll. Drive mechanisms are also proeither the center roll or both of the end rolls of each press section from the 55 same motor driving the couch roll of the web tionarily mounted center I vided to drive dispenses with top rolls mounting of the suction whereby a single center roll replaces at least two of the heretofore necessary top rolls.

the wet soggy web felt around a suction roll over the suction area thereof where water is removed by suction and the absorbing action through the and the suction roll water is squeezed from the follows around a part of the periphery of the center roll and through the nip of the paper web through the rolls is in a vertical direction. As the additional amount of water is removed from the web when it passes through the nip the nip because the nip 10 Claims. (CI. 92-49) forming' section to insure a uniform speed of operation.

It is then an object of this invention to provide a horizontal press roll section for extracting water from wet webs.

place the top rolls used with each suction or plain press roll in the press roll section of a paper machine with a center roll capable of serving two plain or suction rolls.

Another object of this invention is to reduce the space occupied by the press section of a paper machine.

A further object of this invention is to provide a press roll assembly for paper machines wherein end rollers separate by gravity from a center roller.

A further object of this invention is to provide a press roll assembly for paper machines that can be driven directly with the couch roll of the web forming section of the paper machine.

Another object of this invention is to increase the life of felts for conveying webs from the web forming section of a paper machine through the press roll section of the machine.

A further object of this invention is to eliminate the breaks of paper which frequently occur between the first and second presses of a paper machine.

Other and further objects of this invention will become apparent from the following detailed description of the annexed sheets of drawings which illustrate preferred embodiments of the invention.

On the drawings:

Figure 1 is a diagrammatic side elevational view of a press roll assembly according to this invention disposed between the couch roll end of the web forming section and the drying section of a paper machine;

Figure 2 is a diagrammatic side elevational view similar to Figure 1 but illustrating a modified form of press roll assembly;

Figure 3 is a side elevational view of a press roll assembly according to this invention;

"alignment the paper press roll horizontal the center Figure 4 is an enlarged cross-sectional view,

A furtherobject of this invention is to re- 5 end roll drive mechanism for press roll assemblies of this invention.

As shownon the drawings:

In Figures 1 and 2 the reference numeral III indicates the forming wire of a paper machine of the Fourdrinier type having a web W thereon. The forming wire is trained around a suction couch roll H having a suction head l2 therein for removing water through the wire from the web. The web W after passing over the suction area of the couch roll II is trained under a guide roll l3 and onto a conveyor felt l4 of a press roll assembly according to this invention. The felt I4 is disposed around guide rolls I 5 and I6 and over a suction roll I! having-a suction head l8 therein adjacent the nip defined by the roll I! and a center roll As the Web W on the felt I4 passes over the suction area defined by the suction head l8 water is removed from the felt and web by suetion. As the felt and web advance through the nip of the rolls l1 and I9 additional water is removed from the web by pressure exerted between the rolls. center roll l9 around its bottom portion thereof into contact with a second felt 20 ,trained around a second suction roll 2|, as shown in Figure 2, or around a plain press roll 2|a as shown in Figure 1.

As shown in Figure 1, the felt 28 is trained over a guide roll 22 mounted between the center roll I9 and the plain press roll 2la. The felt 26 in the structure shown in tacts the web W on the center roll l9 as the web passes through the nip of the rolls I9 and 2la where additional water is squeezed from the web. The felt 20 follows around the plain press roll 2la. while the web W is trained over a guide roll 23 mounted above the plain press roll 2m and is then directed around drier drums 24.

In the structure shown in Figure 1, the center roll i9 is rotatably mounted on a base 25 which also supports a shaft or a pair of shafts 26 for pivotally mounting supports such as 21 for the suction roll l7. However, the plain press roll 2la is pivotally mounted on a separate base 28 spaced from the base 25.

In the structure shown in Figure 2 a single base 29 supports both the center roll I9 and the end suction rolls l1 and 2|. The center roll is stationarily but rotatably mounted on the base 29 while the end rolls I I and 2| are pivotally mounted on the base 29. The suction roll 2| has a suction head 30 defining a suction area in advance of the nip of the center roll 19 and the suction roll 2!. The felt 20 therefore contacts the suction area before the web W contacts the felt. In this manner the felt 29 can be dried by suction to render the same that when the felt and web the nip of the rolls i9 and 2| water squeezed from the web is readily absorbed by the felt. Ifdesired, the suction area can extend into the nip of the rolls l9 and 2|. I should be noted that the guide roll 22a of the structure shown in Figure 2 is mounted to the left of the suction roll 2|, whereas in Figure 1 the guide roll 22 is mounted between the plain press roll 2| a and the center roll l9.

In the structure shown in Figure 2 the web W are passed through after passing through the nip of the rolls I9 and 2| is trained around a guide roll 23 and directed around the drier drums 24 identically with the arrangement shown in Figure 1.

In both Figures 1 and 2 the felts l4 and 20 are IQ of the press roll assembly.

The web W then follows the Figure 1 therefore conber 56 which is more absorptive so trained around stretcher rolls 3| and 32 respectively for maintaining the felts in the desired chine is conveyed arounda suction press roll overthe suction area thereof and through the nip of the suction roll and a center roll. The web then follows around the center roll and through the nip of the center roll and either a suction or plain press roll where additional amounts of water are removed by pressure and/or suction.

Suitable mechanical structure for the press roll assemblies shown diagrammatically in Figures 1 and 2 are illustrated in the remaining Figures 3 to 7 and will now be described in detail.

As best shown in Figure 3, a forming wire 40 carrying a wet soggy web W thereon is trained around a couch roll 4| having a suction head 42 for removing water from the web by suction. The web W is then directed under a guide roll 43 into contact with a felt 44 as the web and felt pass over a guide roll 46 rotatably carried in supports such as 41 depending from bearing housings such as 48 for a suction roll 49 of the press base 55 of the assembly. The passageway in the manifold supporting member 53 communicates with a flexible pipe or coupling 56 iFig. 5) for joining the suction head 5! of the suction roll 49 with a vacuum pump (not shown).

The other bearing housing 48 for the suction roll 49 is directly mounted on a supporting memgther main supporting member 55a of the assem- A catchall or pan 58 (Fig. 3) is mounted under the roll 49 for collecting water as it drips from the felt and roll. This pan 58 is suitably sup ported on the supporting members 53 and 56.

A foot 59 is formed on the supporting member 53 to prevent the roll from being tilted away from the center roll beyond a desired amount. A similar foot is provided. on the other supporting member 56.

The main supporting members 55 and 55a for pivotally supporting the roll 49 carry bearing housings 69 for rotatably supporting a center roll 6|. The bearing housings have yoked arms 62 and 63 extending therefrom.

A second main supporting base 65, or a pair of such bases, is provided in spaced relation from A pan or catchall tray 13 is mounted under the pivoted as at 51 (Figure 5) to the v roll 68 for receiving water squeezed from the nip. The roll 68 as shown is of the plain type.

Each of the bearing housings 48 and 69 for the rolls 49 and 68 have upwardly extending ,arms 15 and 16 respectively with bifurcated ends 11 (Figure 5) having notches 18 cut therein.

The yoked arms 62 of the bearing housings 68 for the center roll 6| having pivot pins such as 19 extending therethrough (Figure 4) for pivotally carrying the apertured ends 88 of rods 8| as shown in 4. Each rod 8| extends between the fingers of the bifurcated ends'11 of an arm 15 of a bearing housing 48 and through a boss member 82 which is slidable on the rod and has notched portions 83 fitting in the grooves 18 of the fingers of the bifurcated ends 11'.

The rod 8| extends through a gear housing 84 containing a geared member 86 rotatably mounted therein. This end of the rod 8| is threaded, as at 86, and is in threaded relation with the member 85. A small pinion gear 81 is mounted on a shaft 88 rotatably supported by the housing 84. The gear 81 meshes with the geared member and the shaft 88 is keyed to a hand wheel 89 to permit manual rotation of the gear 81.- A coiled spring 98 is disposed around the rod 8| between the gear housing 84 and the boss 82. The compression of the spring the bosses 82 against the bifurcated end 11, thus tending to move the roll 49 against the center roll 6| because of the pivotal mounting of this roll. The amount of compression of the spring 98 is manually adjusted by rotation of the hand wheel 89. The amount of compression of the spring can be measured by an'indicating device 9| carried from the gear housing 84 and a finger 92 carried from the boss 82.

When the compression of the spring 98 is released the roll 49 can 'be tilted backward until the feet 59 of the supporting member 53 rest against the floor. In this open position the paper web W can be threaded through the press roll assembly or the assembly can be cleaned.

The plain press roll 68 carries an identical mechanism such as described in Figure 4. This mechanism is indicated generally by the reference numeral 94.

A wiper rides 0 top of the center roll 6| and is carried from an angle member 96 which is pivotally mounted as at 91and is carried from the frame structure of the machine.

The arms 63 of support bearing housings such as 96 for a guide roll 91 to direct the web W away from the press roll assembly.

If desired a marking roll or a smoothing roll 6|.a can act against the web W as it passes around the center roll 6|. This roll 6|a can be positioned under the center roll6l as shown in Figure 3 or on top of the center roll if desired. As is known. a marking roll will watermark the web and a smoothing roll will remove wire marks from the bottom of the web. Smoothing rolls are generally rubber covered with a comparatively soft rubber.

From the above description it should be understood that the web W upon leaving the forming wire 48 is carried by the felt 44 over the guide roll 46 and around the suction roll 49. It is then passed through the nip of the suction roll 49 and the center roll 6| at the same time passing over the suction head 5| of the suction roll. The amount of pressure between the rolls 49 and BI is carefully adjusted by a manipulation of the hand wheels 89. The'web W is then separated portion of the center roll may be marked with a marking roll 6Ia. Thepulley I86 keyed to therefore urges the bearing housing 68 also stood that this invention from the felt 44 and is passed around the lower 6| where if desired it web follows the roll 6| into contact with the second felt 61. The web W and felt 61 then pass through the nip of the center roll 6| and the plain press roll 68. The web W is then separated fron. the felt 61 and passed around the guide roll 91 into the drier section of the machine or through another press assembly.

As shown in Figure section and the centerroll of the press roll section. The motor I88 is connected through flexible couplings |8I and I82 to the shaft I88 of the couch roll (not shown). At the same time a pulley I84 at the other end of the motor drives a plurality of belts I85 which in turn drive a a shaft I81 which is coupled with the center roll 6| of the press roll section.

The center roll then drives both of the end rolls 49 and 68 by frictional contact therewith.

If desired, as shown in Figure '7, the end rolls of each press roll section can be driven instead of the center roll.

In Figure '7, the motor I I8 is connected through flexible couplings III and 2 to the shaft I83 of the suction couch" roll 4|. The other end of the motor is provided with a pulley I I3 having a therearound for plurality of belts II4 trained driving a second pulley |I5 secured to shaft H6. The shaft 6 has a pulley II1 keyed thereon with a plurality of belts I I8 trained therearound for driving another pulley I|9 keyed to a second shaft I28.

The shaft H6 is coupled to a shaft I2I which shaft I2I, in turn, is coupled through a universal joint I22 to an intermediate shaft I23. The shaft I23 is coupled through a second universal joint I24 to the drive shaft I25 of the suction roll 49 in the press roll assembly.

The shaft I28 driven by the pulley H9 is coupled to a shaft I26 which shaft in turn'is coupled through a universal joint I21 to an intermediate shaft I28. The shaft I28 is coupled through a second universal joint I29 to the drive shaft I38 of a second suction roll 68a of the press roll assembly.

Universal joints I22, I24, I21 and I29 permit the suction rolls 49 and 68a to be tilted about 6, a single motor I88 is used to drive both the couch roll of the web forming' their pivot points without interfering with the driving of these rolls.

It is obvious that the motor I I8 drives the suction couch roll 4| of the web forming section of the machine and at the same time drives both of the suction press rolls 49 and 6841 through the belts H4 and H8. v

As shown in Figur 7, the roll to the left of the center roll 6| is a suction press roll whereas the roll 68 described in Figure 3 is a plain press'roll.

In the diagrammatic views described in Figures 1 and 2, Figure 1 illustrates a press roll assembly in which the roll to the left of the center roll is a plain press roll while Figure 2 illustrates the roll to the left of the center roll to be a suction press roll. Thus according to this invention a press roll assembly may contain apair of suction rolls or may contain one suction roll and one plain press roll.

From the above description it should be underprovides a press roll assembly in which a single center roll serves the purpose of a pair of press rolls of either the plain or suction type. The press rolls can be manually adjusted without effort to exert any desired pressure against the center roll and either the center roll or both of the press rolls The center roll can be rubber covered, or can.

7 have a periphery composed of plain or gun metal steel, stone or composition material. The side rolls can also be rubber covered. The rollers do not need to be highly crowned since they are mounted in horizontal alignment and are not subjected to the bowing action occurring in vertical alignment of press rolls. The felts used in the press roll assembly are not subjected to reverse bends and therefore have a much longer life. I

The horizontal press roll'assemblies of this invention can be placed closely adjacent the couch roll end of the web forming sections of paper machines as illustrated in Figures 1, 2 and eliminating the long draw of the wet web between the couch roll and the conventional press roll sections. This elimination of the long draw of the wet web contributes to an elimination of the stretching of the plastic web thereby producing a stronger sheet.

Furthermore in the conventional type of press section the sheet is carried a considerable distance by the felts after passing through the nips of the rolls. Since the felts carry large amounts of water after leaving the nips'of the rolls, the sheet carried thereon can reabsorb water therefrom. In the press roll assemblies of this invention the sheet does not contact the felts after leaving the nips of the rolls and cannot reabsorb water therefrom.

As a result the press roll assemblies of this invention also produce drier sheets.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

1. A web dewatering press roll assembly having a free draining nip allowing gravity drainage of water therefrom and not requiring crowning of the rolls to offset against vertical deflection thereof for maintaining uniform pressures throughout the lengths of the rolls comprising three rolls having their axes lying in horizontal alignment, bearings for rotatably supporting said rolls, means urging the side rolls toward the center roll on opposite sides thereof to exert pressure in the two nips between the rolls whereby stresses on the center roll bearings are lessened by the opposed forces acting on the center roll and means feeding a wet web down through one of thenips between the rolls and up through the other nip between the rolls whereby liquid squeezed from the web in the upward passage nip can drain by gravity away from the web.

2. A web dewatering press roll assembly having a free drainingnip allowing gravity drainage of water therefrom and not requiring crowning of the rolls to offset against vertical deflection thereof for maintaining uniform nip pressures throughout the lengths of the nips therebetween, comprising a center roll, rolls on each sideof the center roll having their axes in horizontal alignment with the axis of the center roll, means urging the side rolls toward the center roll to center roll and with nips between the rolls, web to the assembly for one nip and up through the other nip and a suction device at the downward passage nip for removing water therefrom, said upward passage nip being free draining for gravity drainage of water away from the web.

3. A web dewatering press roll assembly having .a. free draining nip and not requiring crowning of the-rolls to offset against vertical deflection thereof for maintaining uniform nip pressures throughout the lengths of the nips therebetween having their axes in horizontal alignment, means urging the side rolls toward the center roll to create pressure between the rolls at the nips therebetween, guide rolls disposed beneath the assembly, a first felt looped around the first roll and a guide roll, a second felt looped around the third roll and a guide roll, means for supplying a wet web to the first felt for downward passage therewith through one nip so that said web may pass around the center roll and upwardly through the other nip with the exertpressure in the two means feeding a wet around the first roll of the. assembly and said guide roll, means driving the felt to convey a wet web of paper down through the nip between the first roll and center roll so that said web may pass around the center roll and up through a free draining nip between the center roll and third roll, and a mechanical suction device for removing water above said nip between the first and center roll away from the web and center roll.

5. A press roll assembly comprising a base,

arms projecting upwardly from the base, a center roll rotatably mounted on said arms, standards pivoted to the base on either side-of said arms, side rolls rotatably carried on said standards and means for swinging said standards about their pivot points to bring the side rolls into peripheral pressure relation with opposite sides of the the axes of the side rolls in horizontal alignment with the axis of the center roll.

6. A press roll assembly comprising a base, bearing supports extending upwardly from said base, a center roll rotatably carried at its ends on said supports, supporting structure on each side of the base, standards pivoted to said structure, bearing housings carried on said standards, side rclls rotatably carried at their ends in said housings, rods pivoted to said bearing supports for the center roll, arms extending from said bearing housings for the side rolls receiving the rods therethrough, springs, disposed around said rods between the arms and the ends of the rods, and means threaded on the ends of the rods for compressing the springs to swing the standards about their pivots and to urge the side rolls into peripheral pressure relation with opposite sides of the center roll with the axes of all three rolls in horizontal alignment.

7. The process of deliquefying wet paper webs in a horizontal press roll assembly having rolls in pressure relation with axes in horizontal alignment, which comprises conveying the web on an absorbent carrier in a downward direction through the nip between the first two rolls to squeeze water from the web, sucking water from said nip away from the web and second roll, separating the web from the carrier after passage through said nip, conveying the web on the second roll up through the nip between the second and third rolls of the assembly to squeeze additional liquid from the web, and allowing the squeezed out liquid to drop by gravity out oi said nip between the second and third rolls.

-' 8. The process of dewatering wet wens 'in a horizontal press roll assembly having three rolls in pressure relation with axes in horizontal alignment which comprises passing the web in a downward direction through the nip between the first two rolls to squeeze water from the web, sucking water from said nip, passing the web around the "second roll up through the nip between the second and third rolls of the assembly to squeeze additional liquid from the web, and allowing the squeezed-out liquid to fall by gravity away from the web.

9. The process of dewatering wet sheets of paper in a press roll assembly having three rolls which comprises urging the first and third rolls toward the center roll to create nip pressures therebetween, maintaining the axes of all three in a horizontal press roll assembly having a 7 center roll and suction rolls on each side thereof in peripheral pressure relation therewith which comprises disposing the axes of the rolls in horizontal alignment to maintain uniform .nip pressures throughout the lengths of the rolls, conveying a wet web on a felt downwardly through the nip between the first section roll and the center roll, applying suction through said first roll as said nip to remove water from the web by combined suction and pressure, separating the web from the felt after passage through said nip, conveying the web on the center roll into contact with a second felt, passing the web and second felt up through the nip of the third roll and center roll to squeeze more water from the web, allowing the squeezed-out water to fall by gravity away from the web, and applying suction through the third roll to remove water from the second felt before the felt contacts the web.

EARL E. BERRY.

CERTIFICATE OF CORRECTION. Patent No. 2,209,756. July 30, 191w.

' EARL E. .BERRY.

It is hereby certified that error. eppears in the printed specification of the above numbered patent requiring correction as follows: .Pege 5, second column, line 20, claim 10, for the word "section" read --suction-; line 22, same claim, for "as" read --at--; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed. this 27th day of August, 191w;

. Henry Van Arsdale,

(Seal) 7 Acting Conmxissioner of Patents. 

